There are several factors to consider when you’re trying to sort through the best headlamps.
Brightness
Headlamp brightness is typically measured in lumens. The higher the lumen count, the brighter the light.
Generally, anything over 300 lumens is sufficient for hiking or general tasks. You may want something brighter for trail running or if you want longer-distance illumination.
Some headlamps have 1000 lumens or higher, which is incredibly bright. These high-power headlamps are awesome, but they also use a lot more power and drain their batteries quickly on the highest mode.
Weather Resistance
If you’re using a headlamp for hiking, running, camping, or anything else outside, there’s a good chance it will get rained on.
Most headlamps are IPX4 rated, which means they are tested to withstand splashing or jets of water. This rating is completely sufficient for rain and weather protection.
If you want the absolute